Multiple derrick construction



1935- M. J. SASGEN ET AL 2,051,497

MULTIPLE DERRICK CONSTRUCTION Filed Sept. 19, 1952 3 Sheets-Sheet l (clif/ A -18,1936. M. .1. SASGEN ET AL 2 051,491

MULT IPLE DERRI CK CONSTRUCTION Filed Sept. 19, 1932 5 Sheets-Sheet 2 Aug. 18, 1936.

M. J. SASGEN ET AL MULTIPLE DERRICK CONSTRUCTION Filed Sept. 19, 1952 5, Sheets-Sheet 3 Patented Aug. 18, 1936 PATENT OFFICE MULTIPLE DERRICK CONSTRUCTION Michael J. Sasgcn and Matthias F. Sasgen, Chicago, 111., assignors to Sasgen Derrick Company, Chicago, 111., a corporation of Illinois Application September 19, 1932, Serial No. 633,856

Claims. (01. 212-58) This invention relates to improvements in derricks.

There are three main kinds or types of derricks known as stiff-leg, guy-line and combined stiffleg and guy-line.

This present invention relates to means arranged and adapted for providing, with a minimum of investment, parts readily adaptable for arrangement alternately as one or another of these several types of derricks.

In a stiff-leg derrick, the boom can be longer than the mast while, in a guy-line derrick, the boom is generally shorter than the mast and an important feature of the invention relates to the provision of interchangeable parts and connections whereby the boom can readily be made long or short for use in a stiff-leg or guy-line derrick, and the extra part or length used in the mast to lengthen it for use in a guy-line derrick.

Another feature relates to a guy-line cap for the top of the mast provided with means for securing the upper ends of the stiff-legs thereto so that the one cap is useful for the two purposes.

Tothe accomplishment of the above and other advantages, the invention consists in the means herein fully disclosed and particularly'pointed out in the app-ended claims, the accompanying drawings, formingpart ofjthis specification, and the following description'settingforth in detail one embodiment exemplifying the invention, such disclosedarrangernents of parts and devices and combinations of parts constituting, however, but one of various applications of the principle of the invention. 7

The invention will be more readily understood by reference to said drawings in which:--

Fig. 1 is a side elevational view of a stiff-leg derrick in which the various features of the invention are embodied;

Fig. 2 is a top plan view of the derrick shown in Fig. 1;

Fig. 3 is a fragmentary vertical section of the structure in Fig. 1;

Fig. 4 is an enlarged fragmentary horizontal section on the line l4 of Fig. 3; I

Fig. 5 is a fragmentary vertical section on the line -5 5 of Fig. 4;

Fig. 6 is afragmentary horizontal section on the line 66 of Fig. 3;

Fig. '7 is a view similar to Fig. 5, but" showing the connection of a guy-line instead of a stiff-leg to the top of the mast;

Fig. 8 is a fragmentary side elevation of a guyline derrick showing a middle section in the mast instead of in the boom;

Fig. 9 is a fragmentary top plan view of the guy-line derrick shown in Fig. 8; and

Fig. 10 is a top plan view of a combined stiff 5 leg and guy-line derrick.

As mentioned herein before the three usual forms of derrick of the kind to which this invention relates are stiff-leg, guy-line, and combined stiff-leg and guy-line. 10

The stiff-leg form is shown in Figs. 1 to 6 inclusive; the guy-line form is shown in Figs. 7 to 9 inclusive, and certain features which are common to both these forms are shown in connection with the stiff-leg form; the combined form is shown in Fig. 10.

The broad idea underlying this invention is the provision of simple means, arranged and adapted for the convenient production of the several forms of derricks as may be needed by a contractor in carrying out needed work on a construction job.

One of the important features is the provision of suitable end sections of a mast and a boom and one intermediate section. The end sections and the intermediate section are formed, arranged and adapted for conveniently and readily using the intermediate section between the two end sections of the boom to make a long boom for use in a stiff-leg derrick or alternately between the end sections of the mast to make a long mast for use in a guy-line derrick.

Fig. 1 shows a stiff-leg derrick having a mast I and a boom 2 and stiff legs 3. All of these parts, as shown. are built up of steel lattice work parts formed, for lightness and stiffness, of angle corner pieces connected by diagonal lattice work braces.

The mast, asshown, consists of a base 4 and a top section 5 connected together by a novel connection 6.

The boom 2, as shown, consists of a base section 1. a top section 8 and a middle section 9.

The boom is pivotally mounted at its lower end on the base of the mast, to swing up and down, and the upper end of the top section is arranged and adapted for receiving and guiding the several operating cables.

' The middle section 9 is secured in place between the two end sections by connections similar to the connection 6 by which the two parts of the mast are secured together.

As is usual in such constructions the lower end of the boom is pivotally mounted on the lower 55 suitable manner but is preferably secured by shrinking the top casting 21 upon the pin. To

guard against any possible inadvertent removal of the pin, clamping bolts 28 extend through the pin'26 andthe head casting 21.

For connecting the upper ends of the stifi-legs 3 to the mast for pivotally mounting the mast, a

bearing member 29 is provided having a long.

central bearing 39 which fits upon the pivot gudgeon 26. a disk with the bearing 30 at its center and the "disk is provided with a series of holes 3| near its edge for the purpose of securing the upper I ends of the stiff-legs to the disk or for securing the guy-lines, when the derrick is a guy-line derrick. a The holes 3| are for receiving bolts 32 for securing thestiff-legs or 'for receiving bolts 33 for securing clevises 34 when'guy-lines are used.

' The upper ends of'the stiif-legs are provided with connecting plates 35 which are adapted to be secured to the member 29 by the bo1ts'32. For readily positioning the upper ends of the stifflegs upon the member 29, the'member 29 is pro j vided with a series of rigid upstanding guide pins 36 arranged nearer the center of the disk 29 than the bolt holes 31' and the connecting plate 35 on the stiff-leg 3 is provided with'a guide opening 31 to receive one of the guide pins 36 and tem porarily hold the stiff-leg in 'place until it "can be secured by the bolts 32. I

This construction provides averydurable pivotal' connectionbetween the stiff-legs land the mast, the bearing of the member 29 on'the pivot gudgeon'being'ample to prevent undue wear.

This isan important improvement over the Oldconstructionin which the connectingTplates 35, which are relatively thin; wereprovided' with openings in their ends 'to receive the pivot gudgeon. Such construction providesbut avery inadequate bearing surface to take. the strains of operation. The outer end of the boom is connected to the V topof the mast head'2'l, through ears 39, clevis 4| and pin 40, by a cable 38 for lifting and lowering the boom. The particular means for con- 7 meeting the boom to the mast, for guiding the cable down the mast, and other details shown but not described 'form, no part of the invention claimed in this application.

I It will now be understood that by meansof this inventionthe several forms of derricks'caii' be producedirom' a minimum amount of material and a minimum expense, that the middle section 9 can be alternately used either in the boom or the mastand that the top mast construction can be used either with stiiT-legs or with guy-lines.

As many modifications of the invention will readily suggest themselves to' one skilled in the The member 29 is in the form of .piate extending from the upper end of the brace, 'the plate provided with openings one of which is adapted to receive one of the projections on the collar to temporarily hold the stiff-leg in position, and other openings adapted to register with the bolt holes in the collar. as and for the purpose specified. 1

2. In a derrick construction, a mast, a connecting, rotatable, flanged collar on the upper end of the mast, a circle of upstanding rigid dowel projections on the collar, the collar provided with a circle of bolt holes radially beyond the circle of. dowel projections, in combination with a stiff leg brace for the mast, a connecting plate rigidly projecting from the upper end of the brace, the plate provided with a. hole for receiving one of the dowel projections for temporarily retaining'the stifi legin position, and'also provided with bolt 7 on the upper end of the mast having a substani tially horizontally extending flange, the flange having holes for receiving guy-line connections or bolts for securing stiff-leg connections, and said flange having upstanding rigid projections for receiving and doweling stiff-leg connections on the collar.

4, In a derrick construction, a 'mast, arigid trunnion projecting up out of the top of the mast a substantially horizontally extending flanged collar rotatable on the trunnion and having a bearing thereon of appreciable length,the flange of the collar having holes for receivingguy-line connections or bolts for securing stiff-legfconnections, and said flange having upstanding rigid doweling projections for receiving stiff-leg connections.

5. In a derrick construction, a mast, a rigid trunnion projecting up out ofthe top of the mast,

a collar rotatably mounted on the trunnion, the

when the two are secured together by a bolt in said hole in the stiiT leg connection and one of the holes in said flange. v V

MICHAEL J. SASGEN. MATTHIAS F. SASGEN. 

